Clandestine church

In the Netherlands, a schuilkerk (Dutch - house church; plural - schuilkerken) is a kind of church that is not recognisable as a church from the outside of the building. They were built in large numbers during the time of the Dutch Republic for use by Roman Catholics, Remonstrants, Lutherans and Mennonites. In cities schuilkerken were especially established in houses and warehouses, whereas in the countryside such churches generally had the appearance of a shed and so became known as Schuurkerken (shed churches).